Wheel



Sept. 14 1926.

A. H. SHOEMAKER WHEEL Filed Oct. 21 1924 INVENTOR 14/1 /72 H JfioemalierATTORNEY Eat Patented Sept. 14, 1926.

UNITED STATES ALVIN H. SHOEMAKER, OF SEATTLE, WASHINGTON.

WHEEL.

Application filed October 21, 1924. Serial No. 744,905.

My invention relates to improvements in small metal disc wheels andmethods of constructing the same and the object of my invention is toprovide a small metal disc wheel that is strong, simple and durable inconstruction and not expensive to manufacture.

Another object is to provide a metal disc wheel having a novel hubstructure in which the metal of the discs is crimped about a hub washerso as to afford great strength and rigidity to the wheel withoutseriously complicating the structure or process of manufacture of thesame.

A further object is to provide a metal wheel formed of two discs havinga separable metal rim grooved annularly for the reception of twin tiresand arranged to securely clinch over the edges of the discs, said rimbeing applied quickly and easily by a method that leaves the wheel trueand round.

Other and more specific objects will be apparent from the followingdescription taken in connection with the accompanying drawings. I

In the drawings, Figure 1 is a view in side elevation of a wheelconstructed in accordance with my invention.

Fig. 2 is a view of the same partly in section and partly in elevationon broken line 22 of Fig. 1.

Figs. 3 and 4 are fragmentary sectional views on a larger scale showingthe manner of applying the rim to the wheel.

Referring to the drawings, throughout which like reference numeralsdesignate like parts, 5 and 6 designate two similar metal discs ofsubstantially dish shape having reversely dished peripheral portions 7,and being disposed with their concave sides together said discs having acontinuous circular bearing against each other as at 8 at the locationwhere the reversely dished portions join the portions 5 and 6. 10 is acentrally arranged tubular hearing member having its ends turned down onthe exterior to form shoulders 11 that support the hub portions of thediscs in spaced apart relation. The hub portions of the discs are bentor drawn outwardly as at 12 in the forming process to form bosses thatfit over the reduced ends of the bearing tube 10 and against theshoulders 11, strong washers 13 are slipped over the bosses 12, theouter ends of the bosses 19. are bent or clinched over thewashers 13 andthe ends of bearing tubes 10 are riveted or upset as at 14 to secure thediscs on the bearing tube. The discs 5 and 6 are thus reinforced by thewasher 13 at the hub where they are called upon to withstand thegreatest strain and are rigidly and permanently secured to bearing tube10 in a simple and inexpensive way so that they form a very substantialhub structure. The reversely bent peripheral portions 7 of the discs areadapted to receive a rim formed-of a single piece of flat sheet metallong enough to completely encircle the wheel. This rim is first formedas by running it through rolls, into substantially the shape shown inFig. 3 with inwardly bent edges 15 and with depressed portions 16between. the edges 15 forming annular grooves for receiving resilienttires 17. I have shown two tire receiving grooves but it will beunderstood that only one of said grooves, or more than two of saidgrooves may be used as desired.

In applying this rim to a wheel the inwardly curved edges 15 of therimmember are placed on the periphery of the reversely curved portions 7 ofthe discs 5 as shown in Fig. 4- and a roller 18 having two side flanges19 is applied as shown and caused to travel around the periphery of thewheel thereby clinching the inwardly curved edges 15 of the rim securelyover the edges of the discs 5 and 6. This clinching process forces thetwo discs rigidly and securely together at the point 8 and, by reason ofthe curvature in the portions 15 forces the edges of said curvedportions securely against the discs 5 and 6 and grips the edges of saiddisc between the curved portions 15 and the grooved portions 16 of therim. The roller '18 travels in a true circle, or the wheel is turned onits axis in a true circle relative to the roller thus insuring that therim will be true and accurate on the wheel.

The foregoing description and accompanying drawings clearly disclose apreferred embodiment of my invention but it will be understood that thisdisclosure is merely illustrative and that such changes in the inventionmay be made as are within the scope and spirit of the following claims.

I claim 1. In a wheel, two metal discs each having an outwardlyprotruding centralboss, a rim, a tubular hub having one end dis posedwithin boss, rigid means on the and resting against said shoulders andWashers fitted over said bosses, the outer ends of said bosses beingclinched over said Washers and the outer ends of said hub being expandedagainst the clinched portions of said bosses.

The foregoing specification signed at Seattle, Washington, this 11th dayof October, 19%.

ALVIN H. SHOEMAKER.

